html, body {
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  font-size: 16px;
  font-family: "Microsoft Yahei", Arial, Helvetica, sans-serif;
}

div, a, li, ul, ol, table, th, td, tr, label, input, span, button, strong,
em, i, p, h1, h2, h3, h4, h5, h6, b, select, option {
  padding: 0;
  margin: 0;
} 
 